Steam-boiler.



SNO. 741,485. f .PATENTLD 00T,13,190'3 Y VB H. GRBENL". STEAM BOILB'R. APPLICATION FILED 001.29. 1902.

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yUNITED STATES Patented October 13, 1903.

Pa'rlivTv OFFICE.

'STEAM-BOILER.

SPECIFICATION forming m of Letters Patent NQ. 741,485, dated october 13, 1903.

Appnoason nea october 29, 1902.1 serial Np. 129,275. (rameau.)

To a/ZZ whom it may concern: i

Be it known that I, BUEL H. GREEN, acitizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvementsin Steam-Boilers, of which the following is a specification.

This invention relates to steam-boilers, and the purpose of the same is to provide a novel organization of oompactly-arran ged elements by which steam maybe generated and superheated with the use of aV minimum amount of heat, which is caused to thoroughly circulate through a series of tubes in a direction reverse to the circulation of the water about the tubes and inl the boiler, and` to so dispose steam-conveying means within the boiler that the same heat which is utilized in the formation of the steam will also effectively superheat the latter in the conveying means.

The invention consists in the novel construction and arrangement of the several parts, which will be more fully hereinafter described and claimed.

In the drawings, Figure 1 is a transverse vertical section of a boilerembodying lthe features of the invention. Fig. 2 is a horizontal section taken in the Vplane of line 2 2, Fig. 1. Fig. 3 is a horizontal section taken in the plane of line 3 3, Fig. 1. Fig. 4 is a horizontal section taken in the plane of line 4 4, Fig. 1.

Similar numerals of reference are employed to indicate corresponding parts in the several views.

` The numeral l designates the outer shell or casing constructed of suitable metal and having a dome-like top 2 and alower surrounding iiange 3, standing outwardlyfrom the shell or casing 1 at a right angle. A flue# plate 4 is removably bolted toA the flange 3,

and between the same and the bottom plate -5 of a heating-`dome 6 a series of vertical netubes7 are arranged and suitably secured at,

their upper and lower` ends to the respective plates 4 and 5. The flue-tubes 7 open through the plates 4 and 5, and theyare also regularly spaced apart, as in ordinary boiler-tube construction, to permit water to freely circulate therearound. A water-space 8 is formed between the` plate 4 and the dome-like top 2,

and in the samea suitable quantity of water vis fed by any of the well-known means to per# i tending centrally through the boiler and communicating with the heating-dome 6 is a tube V10, having therein A.a burner 11 of any preferred form of construction, but preferably.

'of that character capable of instituting a draft. Removablybolted to the plate 4 and ange 3 of the shell or casing 1 is alower annular heating-chamber 12, with which the iiue-tubes7 communicate, and within the said chamber is a spiral steam-coil 13,-having a supply-pipe 14 extending upwardly through the water-space 8 and communicating with the steam-space 9 labove the water-level through the medium of a curved steam-receiving'extremity 15. The coil 13 is a primary steam-supe'rheating coil, and connected Ywith the inner portion thereof is a pipe 16, which extends upwardly to the center of a secondary superheating-coil 17, disposed in the heating-dome 6 and having an outlet-'pipe 18 extending downwardly through the central tube 11, and from which steam may be taken for any use desired. The lower heating-chamber 12 is formed with an opening 19, through which the heat-currents escape to Vvthe atmosphere or exterior of the boiler. By

wise treated; but before such operation it will be understood that the water` will be drawnoff from the water-space 8. To supply vthe boiler with Water, a suitable valved pipe 2O will be connected thereto, and the water from the space 8 may be drawn oi or permitted to run out through the saidA pipe. Y

In operation the heat from the burnerll passesup through the central tube 10 into thel heating-dome 6 and'then downwardly through the fine-tubes 7 into the lower-heating-chamber 12 and out through the opening 19 to the atmosphere or exteriorof theboilei. By such circulation of the heat-currents it will be seen that the water' in the space 8 will be thoroughly-heated by contact with the flue? IOO tubes, the plate 1i, and the heating-dome 6, and the steam as formed will pass into pipe 14 through the coil 13, upwardly to the coil 17, and outwardly through the ,service-pipe 18, and during such circulation of the steam it will become superheated by the use of the same heat utilized in the formation of the steam, and hence an economical use of caloric will result. By having an increased heating service Within the boiler and comprising the tubes 7, heating-chamber 6, and plate 4 steam can be readily generated, particularly after the said heating means become thoroughly affected by the heat-currents. The boiler is compact in form and is capable of general use.

Having thus fully described the invention, what is claimed as new is- 1. Aboilercomprsinganinteriorly-located heating-dome, a lower heating-chamber, duetubes connecting and opening into the dome and chamber, a central heat-supplying tube communicating with the heating-dome, and Steam-superheating coils in the chamber and dome respectively having pipes extending from the steam-space and to the exterior of the boiler, said coils being connected with each extending up to the steam-space, and a second ary superheating-coil in the heating-dome connected to the said primary coil, and also having an outlet or service pipe projecting downwardly through the heat conveying tube.

In testimony whereof I affix my signature in presence of two witnesses.

BUEL Il. G BEEN.

lfVitnesses:

H. B. RossITER, L. E. BERKEET. 

